diff --git a/camlibs/canon/serial.c b/camlibs/canon/serial.c
index 0bedde5f6..587b48f7b 100644
--- a/camlibs/canon/serial.c
+++ b/camlibs/canon/serial.c
@@ -124,8 +124,10 @@ int canon_usb_probe(gpio_device *gdev, int i)
 
 	if (gpio_usb_find_device(gdev, camera_to_usb[i].idVendor,
 							 camera_to_usb[i].idProduct) == GPIO_OK) {
+/* NOTE: busnum and devicenum are not in latest libusb.   -Scott
 		printf("found '%s' @ %d/%d\n", camera_to_usb[i].name,
 			   gdev->usb_device->bus->busnum, gdev->usb_device->devicenum);
+*/
 		return 1;
 	}